It may be as simple as finding an image within another image, or as taxing as working-out a pictogram.

Some cards just have that spark ~ you know, the stuff Houdini, himself, marveled at as a child!

Puzzle trade cards were novelties... and they wereFREE!

Look at all of the items to try to find ~ a lion, polar bear... two wolves, an elephant... and "what the sick girl should take to cure her headache". It stands to reason that what you need to find is a bottle of Carter's Little Liver Pills!